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Sulfonated polystyrene nanoparticles coated with conducting polyaniline and their electro-responsive suspension characteristics under electric fields
Polymer ( IF 4.6 ) Pub Date : 2017-09-05 , DOI: 10.1016/j.polymer.2017.09.004
Shang Hao Piao , Chun Yan Gao , Hyoung Jin Choi

Core-shell structured conducting polyaniline (PANI)-coated polystyrene (PS) composite nanospherical particles were synthesized and assessed as a candidate for electrorheological (ER) materials. Monodisperse PS nanospheres were initially synthesized by a dispersion polymerization process and their surface was modified using concentrated sulfuric acid. This allowed the aniline monomer to be adsorbed easily on the sulfonated PS nanosphere and polymerized further by forming a PS/PANI nanosphere. The ER performance of their suspension dispersed in silicone oil was examined using a rotational rheometer under a variety of electric field strengths. The Bingham fluid model was used to analyze their flow curves to understand the interrelation between shear stress and shear rate. The relationship between the yield stress and electric field strength showed a slope of 2.0 following a polarization model. The dielectric spectra showed a good correlation with the ER performance of the ER fluid.



中文翻译:

导电聚苯胺包覆的磺化聚苯乙烯纳米粒子及其在电场下的电响应悬浮特性

合成了核-壳结构导电聚苯胺(PANI)涂层的聚苯乙烯(PS)复合纳米球形颗粒,并将其评估为流变(ER)材料的候选材料。首先通过分散聚合工艺合成单分散PS纳米球,并使用浓硫酸对它们的表面进行改性。这使得苯胺单体易于吸附在磺化的PS纳米球上,并通过形成PS / PANI纳米球而进一步聚合。使用旋转流变仪在各种电场强度下检查了分散在硅油中的悬浮液的ER性能。使用宾厄姆流体模型分析其流动曲线,以了解剪切应力与剪切速率之间的相互关系。遵循极化模型,屈服应力与电场强度之间的关系显示为2.0的斜率。介电谱显示出与ER流体的ER性能良好的相关性。

更新日期:2017-09-05
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